diff --git a/tree.cc b/tree.cc
index 7a198f2..1706f7a 100644
--- a/tree.cc
+++ b/tree.cc
@@ -4,7 +4,6 @@
 #include <mutex>
 #include <algorithm>
 #include <stdexcept>
-#include <type_traits>
 
 class INode;
 class ILink;
@@ -134,7 +133,8 @@ private:
     mutable std::mutex lock_;
 };
 
-// Типизированная связь один ко многим
+// Note: TypedOneToManyLink ensures type-safety on child linkage
+
 template <typename TChild>
 class TypedOneToManyLink : public OneToManyLink {
 public:
@@ -149,7 +149,8 @@ public:
     }
 };
 
-// Базовая реализация LinkMixin
+// Note: BaseLinkMixin is used for direct eager link composition (non-lazy)
+
 class BaseLinkMixin : public ILinkMixin {
 public:
     explicit BaseLinkMixin(NodePtr self) {
@@ -182,7 +183,8 @@ protected:
     LinkPtr link_;
 };
 
-// Ленивый LinkMixin с выбором стратегии по типу
+// Note: LazyLinkMixin starts with LeafLink and upgrades dynamically
+
 template <typename TNode>
 class LazyLinkMixin : public ILinkMixin {
 public:
@@ -243,7 +245,6 @@ private:
     LinkPtr link_;
 };
 
-// Пример узла
 class SimpleNode : public INode, public std::enable_shared_from_this<SimpleNode> {
 public:
     static std::shared_ptr<SimpleNode> create(std::string name) {
@@ -273,7 +274,6 @@ private:
     LinkMixinPtr mixin_;
 };
 
-// Пример использования
 void printTree(const LinkPtr& link, int indent = 0) {
     for (int i = 0; i < indent; ++i) std::cout << "  ";
     auto node = link->getNode();